PC based SCADA Implementation Using Micro controller AT89S52 project explains about developing a atmospheric parameters using MAX232 micro controller and take required actions to control these parameters using a external systems like cooling systems ..etc. Sensors are used to sense information from surroundings and send information to personal computer.

Relays are used to control external devices for cooling temperature. Fan is connected to relays which will take input from micro controller to switch on or off the system. Micro controller is central part for taking decisions, code is written in c language and update them to micro controller with some instructions. Based on this instructions system is controlled.